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https://pfizer.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
1
PASS
13
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
40
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

944 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.44 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

449 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.003

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

981 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.83 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
13 PASS 1 REVIEW 1 FIX
D
Third-Party Impact
Action
81% third-party, 0 ms blocking
FIX
81% third-party, 0 ms blocking
Warning::
Third-party code accounts for 81% of page weight (422.9 KiB of 523.1 KiB)
Info::
Third-party blocking time is low (0 ms)
19%
81%
First-party Third-party
C
JS Execution Cost
Action
1087ms total JS execution
REVIEW
1087ms total JS execution
Warning::
https://pfizer.com/cdn-cgi/challenge-platform/h/b/...: 869ms CPU time
Info::
Unattributable: 144ms CPU time
Info::
https://pfizer.com/: 74ms CPU time
Info::
Third-party scripts: 144ms (13% of total)

Main Thread Breakdown

Script Evaluation 76% Other 15% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://pfizer.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efffe1b9e473c93869ms817ms16ms1st
Unattributable144ms5ms0ms3rd
https://pfizer.com/74ms9ms1ms1st
A+
Page Weight Budget
523 KB transferred, 22 requests
PASS
523 KB transferred, 22 requests
Info::
Page weighs 921 KB (523 KB transferred)
Info::
22 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
523 KB / 2.4 MB budget
523 KB transferred
22 requests
0.11 g CO2 per page load
Other 316.9 KiB 61%
HTML 98.3 KiB 19%
JavaScript 89.4 KiB 17%
Images 12.0 KiB 2%
Other 4.8 KiB 1%
Other 1.7 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 12 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
11 scripts, 0 KB unused
PASS
11 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pfizer.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efffe1b9e473c9372 KB—✓1st
blob:https://pfizer.com/432d6727-5927-4ac1-9f43-ce36d2e59f240 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://pfizer.com/f08ba4a4-c202-47ea-ac31-5da0e3d792b0-0 KB—✓3rd
blob:https://challenges.cloudflare.com/b682e23b-b6bd-4d80-aba2-80d3e444a9380 KB—✓3rd
blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41-0 KB—✓3rd
blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41-0 KB—✓3rd
blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41-0 KB—✓3rd
blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41-0 KB—✓3rd
blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41-0 KB—✓3rd
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
22 resources · 523 KB · 0 KB savings available
PASS
22 resources · 523 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 523 KB
Warning::
16 third-party resources (81% of weight)
Info::
1 resources over 200KB
22 resources · 523.1 KiB · 16 third-party Within 1MB page-weight target
Other 61% · 318.6 KiB
Document 20% · 103.1 KiB
JavaScript 17% · 89.4 KiB
Image 2% · 12.0 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
22 requests over 2206ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 944 ms LCP 1.4 shttps://pfizer.com// https://pfizer.com/ — 307 — 60 B — 65 ms — http/1.1https://pfizer.com// https://pfizer.com/ — 403 — 3.8 KiB — 20 ms — h2https://pfizer.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efffe1b9e473c93/cdn-cgi/challenge-platform/h/b/orc... https://pfizer.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9efffe1b9e473c93 — 200 — 72.0 KiB — 35 ms — h2blob:https://pfizer.com/432d6727-5927-4ac1-9f43-ce36d2e59f24pfizer.com/432d6727-5927-4ac1-9f43-... blob:https://pfizer.com/432d6727-5927-4ac1-9f43-ce36d2e59f24 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit — 200 — 17.4 KiB — 97 ms — h3https://pfizer.com/favicon.ico/favicon.ico https://pfizer.com/favicon.ico — 403 — 5.8 KiB — 22 ms — h2https://pfizer.com/favicon.ico/favicon.ico https://pfizer.com/favicon.ico — 403 — 4.8 KiB — 21 ms — h2https://pfizer.com/cdn-cgi/challenge-platform/h/b/flow/ov1/3594160270:1776809553:LF-d7ov4rwlPFiaU1cNWhn-u54a_SCI9x1hbvxf-iHs/9efffe1b9e473c93/E0kIq7T_Y17VmaK8qDusD1cjHFhNtRqnT5qykiNih38-1776812297-1.2.1.1-1w1ZH84msJ1R.jDPrBseDPhGl8Shqvw3CeHwz7IUujdNd.sC9SEt9BqhnT7wZbGk/cdn-cgi/challenge-platform/h/b/flo... https://pfizer.com/cdn-cgi/challenge-platform/h/b/flow/ov1/3594160270:1776809553:LF-d7ov4rwlPFiaU1cNWhn-u54a_SCI9x1hbvxf-iHs/9efffe1b9e473c93/E0kIq7T_Y17VmaK8qDusD1cjHFhNtRqnT5qykiNih38-1776812297-1.2.1.1-1w1ZH84msJ1R.jDPrBseDPhGl8Shqvw3CeHwz7IUujdNd.sC9SEt9BqhnT7wZbGk — 200 — 13.8 KiB — 37 ms — h2blob:https://pfizer.com/f08ba4a4-c202-47ea-ac31-5da0e3d792b0pfizer.com/f08ba4a4-c202-47ea-ac31-... blob:https://pfizer.com/f08ba4a4-c202-47ea-ac31-5da0e3d792b0 — 200 — -1 B — 24 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/b169j/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/b169j/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 94.5 KiB — 99 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1 — 200 — 208 B — 24 ms — h3blob:https://challenges.cloudflare.com/b682e23b-b6bd-4d80-aba2-80d3e444a938challenges.cloudflare.com/b682e23b-... blob:https://challenges.cloudflare.com/b682e23b-b6bd-4d80-aba2-80d3e444a938 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1072627103:1776809555:BmIdi2STVtUVd1U8czSCHAzL_O0c577w2Xdp6OQL8uQ/9efffe1ddb2600d2/tctjgJKgjqWvHFqjQeKzOu3egZXFnVaYR2hro6soJUs-1776812297-1.2.1.1-zPJjMh.rhYyiATCw4Qs0A0aACJ4lonMOAUziTJnITW5QhOf6WJ13WGiPjPS5vLkRchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1072627103:1776809555:BmIdi2STVtUVd1U8czSCHAzL_O0c577w2Xdp6OQL8uQ/9efffe1ddb2600d2/tctjgJKgjqWvHFqjQeKzOu3egZXFnVaYR2hro6soJUs-1776812297-1.2.1.1-zPJjMh.rhYyiATCw4Qs0A0aACJ4lonMOAUziTJnITW5QhOf6WJ13WGiPjPS5vLkR — 200 — 280.4 KiB — 142 ms — h3blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41challenges.cloudflare.com/c3824afb-... blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41 — 200 — -1 B — 10 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9efffe1ddb2600d2/1776812298186/Pd4wLFwojG7KZofchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9efffe1ddb2600d2/1776812298186/Pd4wLFwojG7KZof — 200 — 6.0 KiB — 21 ms — h3blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41challenges.cloudflare.com/c3824afb-... blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41 — 200 — -1 B — 12 ms — blobblob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41challenges.cloudflare.com/c3824afb-... blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41 — 200 — -1 B — 17 ms — blobblob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41challenges.cloudflare.com/c3824afb-... blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41 — 200 — -1 B — 17 ms — blobblob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41challenges.cloudflare.com/c3824afb-... blob:https://challenges.cloudflare.com/c3824afb-0144-4df5-a4fc-97173669cb41 — 200 — -1 B — 17 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9efffe1ddb2600d2/1776812298186/326e424aacd8ddab912b0b05a344cccf68f76e0c4c65e956f3a9cb1898ffc7cb/7RJFWWdljf2Fl-ochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9efffe1ddb2600d2/1776812298186/326e424aacd8ddab912b0b05a344cccf68f76e0c4c65e956f3a9cb1898ffc7cb/7RJFWWdljf2Fl-o — 401 — 1.7 KiB — 21 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1072627103:1776809555:BmIdi2STVtUVd1U8czSCHAzL_O0c577w2Xdp6OQL8uQ/9efffe1ddb2600d2/tctjgJKgjqWvHFqjQeKzOu3egZXFnVaYR2hro6soJUs-1776812297-1.2.1.1-zPJjMh.rhYyiATCw4Qs0A0aACJ4lonMOAUziTJnITW5QhOf6WJ13WGiPjPS5vLkRchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/1072627103:1776809555:BmIdi2STVtUVd1U8czSCHAzL_O0c577w2Xdp6OQL8uQ/9efffe1ddb2600d2/tctjgJKgjqWvHFqjQeKzOu3egZXFnVaYR2hro6soJUs-1776812297-1.2.1.1-zPJjMh.rhYyiATCw4Qs0A0aACJ4lonMOAUziTJnITW5QhOf6WJ13WGiPjPS5vLkR — 200 — 22.7 KiB — 48 ms — h3blob:https://challenges.cloudflare.com/b3b833be-36bd-4ea1-9f9f-ecfca7ba1428challenges.cloudflare.com/b3b833be-... blob:https://challenges.cloudflare.com/b3b833be-36bd-4ea1-9f9f-ecfca7ba1428 — 200 — -1 B — 10 ms — blob
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
13% of JavaScript execution is third-party
First-party Third-party 144ms · 0KB · $2/mo
Unattributable
Other
Optional
Execution 144ms
Transfer 0 KB
Monthly Cost $2/mo

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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